With the Base free of the machine, the main board is easily accessed. Begin by removing the remaining wires as indicated here. The two power leads (on the right), the two Agitation Motor wires (on the left), and the polarized plug that connects the cooling fans to the main board.

3

Nest, remove the five screws that secure the main board to the base (one screw is concealed by the heat sink in the upper left hand corner in this picture).